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A small high-speed centrifugal pump suitable for wide-range flow regulation

A technology of flow regulation and high-speed centrifugation, which is applied to components, pumps, and pump components of pumping devices used for elastic fluids. It can solve the problems of centrifugal pump anti-cavitation performance limiting rotor dynamics, etc., and achieve excellent anti-cavitation Performance, improve anti-cavitation performance, avoid cavitation effect

Active Publication Date: 2011-12-21
NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of centrifugal pumps in the prior art, which are limited by pump anti-cavitation performance and rotor dynamics problems, the present invention provides a centrifugal pump device with compact structure, small size, high performance and high anti-cavitation performance

Method used

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  • A small high-speed centrifugal pump suitable for wide-range flow regulation
  • A small high-speed centrifugal pump suitable for wide-range flow regulation
  • A small high-speed centrifugal pump suitable for wide-range flow regulation

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Embodiment Construction

[0030] figure 1 It is a schematic diagram of a centrifugal pump device suitable for wide-range flow regulation, including a pump body 1, a shaft arranged in the pump body through bearings (6, 7), a centrifugal wheel, and an induction wheel. The front end of the pump body is provided with a liquid inlet. The side is provided with a liquid outlet. The shaft is connected to the pump body through bearings, and the centrifugal wheel and the induction wheel are installed at one end of the shaft in turn, fixedly connected with the shaft through a key, and rotate together. The other end of the shaft is equipped with a driving machine (motor or turbine), and the power of the driving machine is transmitted to the centrifugal wheel and the induction wheel through the shaft, so as to increase the pressure of the medium (fuel). The device has the characteristics of compact structure, high design speed, high performance and high anti-cavitation performance.

[0031] The above-mentioned ce...

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Abstract

The invention relates to a small-sized high-speed centrifugal pump suitable for flow regulation in a wide range. The centrifugal pump comprises a driving machine, a pump body, a shaft which is arranged in the pump body through bearings, a centrifugal wheel and an inducing wheel, wherein one end of the shaft is connected with the output end of the driving machine, and the other end of the shaft isprovided with the centrifugal wheel and the inducing wheel sequentially; the inducing wheel comprises an inducing wheel hub and inducing wheel blades arranged on the inducing wheel hub; the diameter of the inducing wheel hub is gradually increased from an inlet of the inducing wheel to an outlet; and the pitch of the inducing wheel is gradually increased from the inlet of the inducing wheel to the outlet in a three-section mode, and the inducing wheel is provided with a constant pitch section, a varying pitch section and a constant pitch section sequentially along the axial direction. The technical problems that the centrifugal pump is limited by pump cavitation resistance and rotor dynamics problems in the prior art are solved. The centrifugal pump provided by the invention has the advantages of compact structure, small size, high performance and high cavitation resistance.

Description

technical field [0001] The invention relates to a centrifugal pump device, in particular to a small high-speed centrifugal pump suitable for wide-range flow regulation, which can be used in fuel supply systems of ramjet engines or aeroengines, and can also be used in liquid engine propellant supply systems. Background technique [0002] A ramjet engine uses a pump-type oil supply system. Due to the large range of airspace and Mach number of missile flight, the flow adjustment ratio of the fuel pump (maximum flow / minimum flow of the pump) exceeds 30; due to the narrow space of the missile body, the fuel pump must be small in size and light in weight; At the same time, the inlet pressure of the fuel pump is low, so the fuel pump is required to have high anti-cavitation performance. Using high speed can reduce the structure size and weight, but for fuel pumps, increasing the speed will reduce the anti-cavitation performance of the pump, especially in the ultra-wide flow range,...

Claims

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Application Information

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IPC IPC(8): F04D29/22
Inventor 李永鹏逯婉若陈晖许开富
Owner NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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